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- Phytoremediation as a biotechnological tool for environmental restorationPublication . Marques, Ana P. G. C.; Rangel, António O. S. S.; Calheiros, Cristina S. C.; Oliveira, Rui S.; Franco, Albina R.; Vosatka, Miroslav; Dodd, John C.
- Phytomanagement of Cd-contaminated soils using maize (Zea mays L.) assisted by plant growth-promoting rhizobacteriPublication . Moreira, Helena; Marques, Ana P. G. C.; Franco, Albina R.; Rangel, António O. S. S.; Castro, Paula M. L.Zea mays (L.) is a crop widely cultivated throughout the world and can be considered suitable for phytomanagement due to its metal resistance and energetic value. In this study, the effect of two plant growth-promoting rhizobacteria, Ralstonia eutropha and Chryseobacterium humi, on growth and metal uptake of Z. mays plants in soils contaminated with up to 30 mg Cd kg−1 was evaluated. Bacterial inoculation increased plant biomass up to 63 % and led to a decrease of up to 81 % in Cd shoot levels (4–88 mg Cd kg−1) and to an increase of up to 186 % in accumulation in the roots (52–134 mg Cd kg−1). The rhizosphere community structure changed throughout the experiment and varied with different levels of Cd soil contamination, as revealed by molecular biology techniques. Z. mays plants inoculated with either of the tested strains may have potential application in a strategy of soil remediation, in particular short-term phytostabilization, coupled with biomass production for energy purposes.
- Evaluation of constructed wetlands in series for wastewater treatment in the tannery industryPublication . Franco, Albina R. C.; Rangel, António O. S. S.; Castro, Paula M. L.
- Microbial communities inhabiting a constructed wetland applied to tourism wastewater treatmentPublication . Calheiros, Cristina S. C.; Franco, Albina R.; Bessa, Vânia S.; Rangel, António O. S. S.; Castro, Paula M. L.
- Inoculating Helianthus annuus (sunflower) grown in zinc and cadmium contaminated soils with plant growth promoting bacteria – Effects on phytoremediation strategiesPublication . Marques, Ana P. G. C.; Moreira, Helena; Franco, Albina R.; Rangel, António O. S. S.; Catro, Paula, M. L.Plant growth promoting bacteria (PGPR) may help reducing the toxicity of heavy metals to plants in polluted environments. In this work the effects of inoculating metal resistant and plant growth promoting bacterial strains on the growth of Helianthus annuus grown in Zn and Cd spiked soils were assessed. The PGPR strains Ralstonia eutropha (B1) and Chrysiobacterium humi (B2) reduced losses of weight in metal exposed plants and induced changes in metal bioaccumulation and bioconcentration - with strain B2 decreasing up to 67% Zn accumulation and by 20% Zn bioconcentration factor (BCF) in the shoots, up to 64% Zn uptake and 38% Zn BCF in the roots, and up to 27% Cd uptake and 27% Cd BCF in plant roots. The impact of inoculation on the bacterial communities in the rhizosphere of the plant was also assessed. Bacterial community diversity decreased with increasing levels of metal contamination in the soil, but in rhizosphere soil of plants inoculated with the PGPR strains, a higher bacterial diversity was kept throughout the experimental period. Inoculation of sunflower, particularly with C humi (B2), appears to be an effective way of enhancing the short term stabilization potential of the plant in metal contaminated land, lowering losses in plant biomass and decreasing aboveground tissue contamination.
- Microbial communities inhabiting a constructed wetland applied to tourism wastewater treatmentPublication . Calheiros, Cristina S. C.; Franco, A. R.; Bessa, Vânia S.; Rangel, António O. S. S.; Castro, Paula M. L.
- Microbial communities in a constructed wetland for tourism wastewater treatment: a phytoremediation case studyPublication . Calheiros, Cristina S. C.; Franco, Albina R.; Bessa, Vânia S.; Rangel, António O. S. S.; Castro, Paula M. L.
- Phytoremediation as a biotechnological tool for environmental requalificationPublication . Oliveira, R. S.; Marques, Ana P. G. C.; Calheiros, C. S. C.; Franco, A. R; Vosátka, M.; Dodd, J. C.; Rangel, António O. S. S.; Castro, P. M. L.